Brake shoe supporters

ABSTRACT

Brake shoe supporting pins for use on a spot-type disk brake which are substantially J-shaped pins and are fixed to stationary members on opposite sides of the brake disk. The stationary members may be the housing of an operating cylinder on one side of the brake disk and yoke members extending to the other side of the brake disk.

United States Patent [72] Inventor Yoshinori Mori Toyota, Japan [21 App]. No. 885,749

[22] Filed Dec. 17, 1969 [45] Patented Nov. 23, 1971 [73] Assignee Aisln Seiki Kabushiki Kaisha Kariza, Japan [32] Priority Dec. 28, 1968 [3 3 1 Japan [54] BRAKE SHOE SUPPORTERS 5 Claims, 2 Drawing Figs.

[1.8. CI 188/716 F16d 65/04 [50] Field of Search 188/721,

[56] References Cited UNITED STATES PATENTS 3,189,129 6/1965 Burnett 188/73.6 3,245,500 4/1966 Hambhng et al... 188/734 X 3,402,790 9/1968 Rath 188/725 FOREIGN PATENTS 969,866 9/1964 Great Britain 188/734 Primary E.raminerGeorge E. A. Halvosa Attorney-Pierce, Schefiler & Parker ABSTRACT: Brake shoe supporting pins for use on a spottype disk brake which are substantially .I-shaped pins and are fixed to stationary members on opposite sides of the brake disk. The stationary members may be the housing of an operating cylinder on one side of the brake disk and yoke members extending to the other side of the brake disk.

PATENTEDN V 2 l 3. 621 .946

IN V EN TOR.

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3,621,946 11 2 BRAKE SHOE SUPPORTERS elongated substantially in the horizontal direction while the This invention relates to brake shoe supports for use on outer backing plate 23 also is provided with two elongated spottype disk brake, more particularly, this invention conslots 30 and 31 corresponding to those of backing plate 22. A

housing 12 whilst its outer end 34 1S snapped into an opening yoke portions of the cylinder member This 18 not economical and requires difficult assemblage of parts. In order to over- 35 Y member 13 which substahhahy Parallel h the come the above drawbacks, there has been suggested a hole in housing 12. Similarly, an inner end of the other pm 33 shaped support pm whlch is formed from steel rod and th s secured in another hole (not shown) in the housing while its ends of which are secured in the stationary member as illus- Outer ehd 3h snapped ah ahoi-her epehlhg 37 the trated in us. Pat. No. 3,245,500 or us. Pat. No. 3,402,790. Y also Substantially Parallel with the other hole in the However. this U-shaped pin is not desirable because it is held hous'hg A of ehPs ahd 39 we Preferably Provided t b at inner ends of the pins 32 and 33, respectively, to prevent 23g by one side pomon of the s a mnary mam er as can 1 2 axial movement of the pins. The pin 32 is curved at 40 to allow Accordingly. it is a primary object of the present invention fhsemhg of the outer end 34 thereofgho l e g i to provide new brake shoe support pins which simplifies the h curve ohsupponer 32 befohhe rough er wor construction of spot-type disk brakes, and are easy to assemh eohs'dehahle the Supporter may be hem to ble therein, and economical to manufacmm fit into the opening 35 in the yoke member 13. It should be Further objects and advantages of this invention will be apnoted that h is Possible to bend the h gh pins by suitahlle parent from the following description, reference being had to e The eohsthuehhh of h h 'h the same as t e the accompanying drawings wherein a preferred embodiment Pm so a desenphoh there) e omme The torque on the brake shoes is absorbed by the guide surf i giiw h s ls clearly shown' faces 26 and 27 of the yoke members 13 and 13' not by the FIG. 1 is a plan view of a spot-type disk brake incorporating pihs 32 and because of the hhhzohtahy elongated slots so a pair of brake shoe support pins according to this invention, that the support do not requhe great hardness or Strength and and they may be easily and economically manufactured. HO. 2 is a side elevational view, in the direction of the [clam]: brake disk axis, of the disk brake shown in FIG. 1, although [h a brakefor a fothtahle h hav'hg fnehoh h the brake disk is (mined therefrom. faces thereon and including a housing for an operating Referring to FIGS 1 and 2 a i 10 is fixed to a rotating cylinder on one side Of the brake disk for operating a pair of apparent hereinafter which is supportedv on a stationary 4Q opposite side, the pair of brake shoes being disposed between the pair of yoke members whereby torque created when the a hitfdftiiiio? y l e itfnhei' g f g brake shoes are applied to the brake disk during braking ac. formed integrally therewith is fixed at projecting parts 14, 14' 5 absorbed h l h of the cylinder housing 12 to the stationary member by mountthe f' h eomphs'hg a ofsuhstahhai Y P ing means such as bolts (not shown). The cylinder housing 12 ppfm g Pm}. the onger legs thereof pass ng through having two open ends is disposed on one side of the disk, and Ppehlhgs h h the brake Shoes, e P' hPPh' the yoke members 13, 13 extend in a straddling manner over and many h h e brake Shoe? dhhhg Pi 'f the brake disk 10 m the other side thereof. Within the cylinder brakes P being symfnflflcally deposed with housing 12. there are slidably titted two opposed pistons 15 respect to the h e e the hj ogthe g and 16. One piston 15 is directly engaged with a first brake and e" legs of f P mohhte h e f shoe [7 while the other piston 16 is engaged with one inner respeehvehf to stahohary members on opposhe sldes 0 edge 18 of a movable member 19 of closed-ring shape having the hrhke h h h k an opposite inner edge 20 which is engaged with a second In a chsk brake as elhhhed i lh' I: h P r h brake shoe 21 facing the other braking surface of the disk 10. members are formed 'htegrahy t e ouslhg t e The fi and second brake shoes 17 and 21 comprise operating cylinder, the improvement wherein the ends of the backing plates 22 and 23. and friction linings 24 and 25 5:3 2:! 2:223:2 "22:11:? secured l'espeemely to the 23:55; 2 2:3 5 2F3 gkz s fifi gh ige fi 3: 5:13: 3. lr a disk brake as claimed in claim I the improvement of braking, the brake shoes 17 and 21 receive brake-clamping the epehlhgs e haekmg P'Q of e l Shoes force respectively from the pistons 15 and 16 and inner edge are slots elohgated shbstahhflh) h hoflzomal f' 20 through backing plates 22 and 23, which are slidably h 3 brake as elalmed h F 1 the Improvement guided by the surfaces 26 and 27 which prevent movement of e Suppomhg pmeare 'e the brake shoes in the direction of rotation of the disk 10. h 3 brake as f Clalm 1 the mp m nt The inner backing plate 22 is provided with two slots 28 and the suPPomhg P have cllcuial' Sectlons- 29 which are located near the outer edges thereof and are 

1. In a disk brake for a rotatable disk having friction surfaces thereon and including a housing for an operating cylinder on one side of the brake disk for operating a pair of brake shoes disposed on opposed sides of the brake disk, a pair of yoke members fixed to a stationary member of the vehicle and extending from one side of the brake disk to the opposite side, the pair of brake shoes being disposed between the pair of yoke members whereby torque created when the brake shoes are applied to the brake disk during braking action, is absorbed, the improvement comprising a pair of substantially J-shaped supporting pins, the longer legs thereof passing through openings provided in the brake shoes, said pins supporting and axially guiding the brake shoes during application of the brakes, said pins being symmetrically disposed with respect to the axis of the brake disk, the ends of the long and short legs of said pins being mounted and secured respectively to stationary members on opposite sides of the brake disk.
 2. In a disk brake as claimed in claim 1 in which the yoke members are formed integrally with the housing for the operating cylinder, the improvement wherein the ends of the legs of the supporting pins are secured respectively to the housing and each yoke member.
 3. In a disk brake as claimed in claim 1 the improvement wherein the openings in the backing plates of the brake shoes are slots elongated substantially in a horizontal direction.
 4. In a disk brake as claimed in claim 1 the improvement wherein the supporting pins are resilient.
 5. In a disk brake as claimed in claim 1 the improvement wherein the supporting pins have circular cross sections. 